This machine can be used with duct automatic line, TDF flange duct machine or TDC flange duct machine and Pittsburgh lock machine. The ideal duct connection includes united joint and right-angle side. The seam lock machine SL-12 works out seam of high quality without help of other auxiliary connecting tool. The process does nothing to hurt the surface of the work piece with low noise. The finished seam is close, even and effective. Plates in different thicknesses are workable and can be finished quickly and safely. 

      This machine adopts Mitsubishi PLC to control, with long-time stable working ability, ergonomic design, easy operation and high efficiency. The seam lock speed can be 3 second/one duct.